Dec 5, 2013 6:30pm EST
where more than one in ten students drop out. born to poor immigrant parents in the west african nation of cape verde, dipina knows well the barriers to a child's success. >> i used my-- as a motivation. today as an education-- educator i tell my students don't use your personal issues as an impediment, to come to school. sues it as a motivation. because it will pay off. >> reporter: he says the words in life of one of africa's greatest elders will long inspire. >> and this is the person i was talking about, nelson mandela. >> he paved the way for others. and i think that cycle should only continue, if you want to have a better world. >> reporter: many will remember how nelson mandela changed the world, including one kid in the bleachers who was moved to try to do the same one classroom at a time. >> there is no easy walk to freedom anywhere. >> reporter: jim axelrod, cbs news, boston. >> pelley: in a moment, bill clinton's very personal remembrance. of nelson mandela. too cold. like the last three weekends. asthma doesn't affect my job... you missed the meeting again last week!